Study of... without knowing what the scientists are studying, you cannot know exactly what instruments they are using.
Microscopes... But only for the really small stars.
Scientists use seismometers to study earthquakes. Seismometers are instruments that detect and record the vibrations caused by seismic waves during an earthquake. These devices help researchers analyze the location, magnitude, and effects of earthquakes.
ammeter
They use their eyes and also a variety of instruments, based on the ground or in space, which are sensitive to a large range of electromagnetic radiations.
Thetools scientist use are Barometers, Anemometer's thermometers Richter Scale
There are a number of ground instruments and satellites used to study the sun. To study the interior of the sun, scientists study sound waves vibrating inside of it. The photosphere, chromosphere, and corona, are all observed using special telescopes to detect the corresponding rays coming from each section.
whattools do scientist use to study meteors
Telescopes
Telescope
Binoculars
There are a number of instruments that might be used to study such a phase transition, depending on precisely what it is you're trying to measure. A couple of guesses: thermometer, calorimeter.
Scientists can use instruments like satellites, weather balloons, and ground-based stations to study changes in the Earth's atmosphere. These tools can measure parameters such as temperature, humidity, air pressure, and the concentrations of gases like carbon dioxide and methane. By analyzing data collected from these instruments, scientists can understand trends and patterns in atmospheric changes.